Heater Lamp (Hot Roll Fuser); Thermistor; Sensor (Fuser Exit); Sensor (Narrow Media) (Hot Roll Fuser Only) - Lexmark MS81x Service Manual

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Heater lamp (hot roll fuser)

The heater lamp is a quartz glass tube containing a halogen heater coil. A terminal is mounted to the end of the heater
rod using a harness.

Thermistor

The thermistor monitors the surface temperature of the media-feed portion of the heat belt or heat roll to provide
feedback to the controller board. This information is used to turn the ceramic heater or halogen lamp on and off to
maintain the desired temperature.

Sensor (fuser exit)

The sensor (fuser exit) detects the arrival and departure of media as it passes through the fuser.

Sensor (narrow media) (hot roll fuser only)

The sensor (narrow media) detects the arrival and departure of media as it passes through the fuser. It also detects the
width of the media.

Exit

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"Sensor (standard bin full)" on page 612
Appendix C: Theory of operation
611